On this week's episode of OnStyle's 'Lipstick Prince,' the fifth princess was introduced as SISTAR's Bora! �However, before her identity was unveiled on the show, the princes had to guess.�

Heechul asked the princess, who was hiding behind blinds, "Give us a hint," and she said, "I tried to hold P.O's hand, but he dodged it," raising curiosity.�

Heechul jokingly said to P.O, "Now who did you hurt?" and a taken aback P.O said to the princess, "Maybe you did something wrong to me?"�

SEE ALSO: Nam Bo Ra, eldest of 13 siblings, celebrates bridal shower with her look-alike sisters

The princess was then revealed to be SISTAR's Bora, and P.O asked, "When did I do that?" �She replied, "We performed on stage together once for an award ceremony. We decided to hold hands on stage, but you wouldn't take my hand," sounding upset. �P.O assured her, "I didn't because I was nervous."

Seeing how uneasy P.O looked, Heechul said, "His naivete is all an act," making everyone laugh.